The law requires providing the keys to decrypt (or decrypt for them) the data or face jail. Up to 6 months if I remember correctly.
If one was to use multiple vaults then how are the authorities to know since its all encrypted and only they should know that. EDIT: is vault correct word, or user logins?
This is not entirely correct. A lot of the meta data is ISP generated, like IP/Port src/dst address, time of day, location of device, name/address/phone of customer. These data sets are not masked.
But what SAFE will do is hide the type of communication, real type of data etc.
The effect of using SAFE will be to massively increase the generate/collected/retained meta data that the ISP has to record and it will have very little value to the government agencies and/or civil litigants ability to use discovered data. Assuming that the person makes a lot of use of SAFE.